EASY TO INSTALL. These 5th wheel legs use simple quarter-turn anchors to quickly and easily drop into the truck bed puck system whenever needed (factory puck system required). They fit the CURT 16315, 16540, 16580 or 16590ADJUSTABLE. The quarter-turn anchoring system allows for simple adjustment as needed to provide a perfect fit in the truck bed pucksQUIET TOWING. Because the anchors are adjustable, they easily eliminate chucking and excessive vibrations between the 5th wheel hitch and puck systemVERSATILE. This set of 5th wheel legs fits the puck system in select model years of the Ford F-250, F-350 and F-450 Super Duty with 8-foot bed. They are rated for 30,000 lbs. GTW (limited by lowest-rated towing component)DUAL-COAT. For dependable weather-resistance in your truck bed, these 5th wheel legs feature a dual-coat finish of rust-resistant A-coat and a durable dark grey teridium powder coat